diff --git a/crates/engine/src/cmd/addons/shapes.rs b/crates/engine/src/cmd/addons/shapes.rs
index 87549e3694..950d69fd04 100644
--- a/crates/engine/src/cmd/addons/shapes.rs
+++ b/crates/engine/src/cmd/addons/shapes.rs
@@ -9,6 +9,8 @@
 #[cfg(test)]
 mod tests;
 
+use std::ops::RangeInclusive;
+
 use serde_json::{Value, json};
 use vectorcraft_doc::{LiveShape, NodeId, NodeKind};
 use vectorcraft_geom::{Affine, FillRule, Point, Rect, shapes};
@@ -16,9 +18,25 @@ use vectorcraft_tools::addons::box3d::CustomShape;
 
 use super::super::create::insert_look;
 use super::super::{
-    CommandSpec, Result, Session, bool_or, check_numbers, check_switches, cmd, f64_or, f64_req, has_doc, has_selection, str_param, targets,
+    CommandSpec, Result, Session, bad, bool_or, check_numbers, check_switches, cmd, f64_or, f64_req, has_doc, has_selection, number_or, str_param,
+    targets,
 };
 
+/// The sides of a polygon and the points of a star: whole numbers in this range.
+const COUNTS: RangeInclusive<f64> = 3.0..=1000.0;
+/// `rounded` and `randomized` of a polygon or star.
+const ROUNDING: RangeInclusive<f64> = -10.0..=10.0;
+/// A star's inner radius as a fraction of its outer radius.
+const SPOKE_RATIO: RangeInclusive<f64> = 0.01..=1.0;
+/// A spiral's `turns`.
+const TURNS: RangeInclusive<f64> = 0.01..=1024.0;
+/// A spiral's `divergence`.
+const DIVERGENCE: RangeInclusive<f64> = 0.0..=1000.0;
+/// A spiral's `innerRadius`, as a fraction of its radius.
+const INNER_RADIUS: RangeInclusive<f64> = 0.0..=0.999;
+/// The `arcMode` names; `slice` and `open` are also read as `pie` and `arc`.
+const ARC_MODES: [&str; 4] = ["whole", "pie", "chord", "arc"];
+
 pub fn specs() -> Vec<CommandSpec> {
     vec![
         cmd!(
@@ -26,7 +44,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Rectangle",
             [],
             None,
-            "{x, y, width, height, radius?: pt, radii?: [tl,tr,br,bl], startAngle?, endAngle?: degrees (the part of the outline kept, clockwise from its first anchor, the top-left corner; each side an equal share of 360; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise about the centre (0: upright)} → {id}",
+            "{x, y, width, height: pt, 0 or more, radius?: pt, 0 or more, radii?: [tl,tr,br,bl], each 0 or more, startAngle?, endAngle?: degrees (the part of the outline kept, clockwise from its first anchor, the top-left corner; each side an equal share of 360; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise about the centre (0: upright)} → {id}",
             has_doc,
             rectangle
         ),
@@ -35,7 +53,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Ellipse",
             [],
             None,
-            "{x, y, width, height, startAngle?, endAngle?: degrees (counter-clockwise from 3 o'clock, as object.setLiveShape's pieStart and pieEnd; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise about the centre (0: upright)} → {id}",
+            "{x, y, width, height: pt, 0 or more, startAngle?, endAngle?: degrees (counter-clockwise from 3 o'clock, as object.setLiveShape's pieStart and pieEnd; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise about the centre (0: upright)} → {id}",
             has_doc,
             ellipse
         ),
@@ -44,7 +62,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Polygon",
             [],
             None,
-            "{cx, cy, radius, sides=6, rounded=0, randomized=0, startAngle?, endAngle?: degrees (the part of the outline kept, clockwise from its first anchor, the top corner; each side an equal share of 360; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise (0: a corner straight up)} → {id}",
+            "{cx, cy, radius: pt, 0 or more, sides=6: a whole number 3 to 1000, rounded=0, randomized=0: -10 to 10, startAngle?, endAngle?: degrees (the part of the outline kept, clockwise from its first anchor, the top corner; each side an equal share of 360; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise (0: a corner straight up)} → {id}",
             has_doc,
             polygon
         ),
@@ -53,7 +71,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Star",
             [],
             None,
-            "{cx, cy, radius1, radius2?, points=5, rounded=0, randomized=0, startAngle?, endAngle?: degrees (the part of the outline kept, clockwise from its first anchor, the top point; each side an equal share of 360; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise (0: a point straight up)} → {id}",
+            "{cx, cy, radius1: pt, 0 or more, radius2?: pt, 0.01 to 1 times radius1 (default half of it), points=5: a whole number 3 to 1000, rounded=0, randomized=0: -10 to 10, startAngle?, endAngle?: degrees (the part of the outline kept, clockwise from its first anchor, the top point; each side an equal share of 360; default 0 and 360), arcMode?: whole|pie|chord|arc, rotation?: deg clockwise (0: a point straight up)} → {id}",
             has_doc,
             star
         ),
@@ -62,7 +80,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Spiral",
             [],
             None,
-            "{cx, cy, radius, turns=3, divergence=1, innerRadius=0, clockwise=true} → {id}",
+            "{cx, cy, radius: pt, 0 or more, turns=3: 0.01 to 1024, divergence=1: 0 to 1000, innerRadius=0: 0 to 0.999 of radius, clockwise=true} → {id}",
             has_doc,
             spiral
         ),
@@ -71,7 +89,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "3D Box",
             [],
             None,
-            "{x, y, width, height, angleX=30 (degrees about the level axis: positive tips the top away from you), angleY=30 (degrees about the upright axis: positive turns the right side away from you), angleZ=0 (degrees clockwise in the page), parallelX=false, parallelY=true, parallelZ=false} → {id}",
+            "{x, y, width, height: pt, 0 or more, angleX=30 (degrees about the level axis: positive tips the top away from you), angleY=30 (degrees about the upright axis: positive turns the right side away from you), angleZ=0 (degrees clockwise in the page), parallelX=false, parallelY=true, parallelZ=false} → {id}",
             has_doc,
             box3d
         ),
@@ -80,33 +98,96 @@ pub fn specs() -> Vec<CommandSpec> {
             "Configure Shape",
             [],
             None,
-            "{ids?, radius?, radii?: [tl,tr,br,bl], startAngle?, endAngle?: degrees (as addon.shapes.rectangle, ellipse, polygon and star take them: an ellipse's counter-clockwise from 3 o'clock, the others' clockwise along the outline), arcMode?: whole|pie|chord|arc, sides?, isStar?, spokeRatio?, rounded?, randomized?, turns?, divergence?, innerRadius?, angleX?, angleY?: degrees (as addon.shapes.box3d: positive tips the top, or turns the right side, away from you), angleZ?: degrees clockwise in the page, parallelX?, parallelY?, parallelZ?, reset?: bool} → {updated}",
+            "{ids?, radius?: pt, 0 or more (fitted to half each rectangle's shorter side), radii?: [tl,tr,br,bl], each 0 or more, startAngle?, endAngle?: degrees (as addon.shapes.rectangle, ellipse, polygon and star take them: an ellipse's counter-clockwise from 3 o'clock, the others' clockwise along the outline), arcMode?: whole|pie|chord|arc, sides?: a whole number 3 to 1000, isStar?, spokeRatio?: 0.01 to 1, rounded?, randomized?: -10 to 10, turns?: 0.01 to 1024, divergence?: 0 to 1000, innerRadius?: 0 to 0.999, angleX?, angleY?: degrees (as addon.shapes.box3d: positive tips the top, or turns the right side, away from you), angleZ?: degrees clockwise in the page, parallelX?, parallelY?, parallelZ?, reset?: bool} → {updated}",
             has_selection,
             configure
         ),
     ]
 }
 
-fn parse_arc_params(p: &Value) -> ((f64, f64), shapes::EllipseMode) {
+/// The number `p` gives for `key`, or `default` when `p` leaves it out or gives null. A number
+/// outside `range` is an error that names `key` and the range.
+fn ranged(p: &Value, key: &str, default: f64, range: &RangeInclusive<f64>, cmd: &str) -> Result<f64> {
+    let x = number_or(p, key, default, cmd)?;
+    if !range.contains(&x) {
+        let (min, max) = (range.start(), range.end());
+        return Err(bad(cmd, format!("`{key}` must be between {min} and {max} (got {x})")));
+    }
+    Ok(x)
+}
+
+/// The number of sides or points `p` gives for `key`, or `default` when `p` leaves it out or gives
+/// null. A fraction or a number outside [`COUNTS`] is an error.
+fn count(p: &Value, key: &str, default: u32, cmd: &str) -> Result<u32> {
+    let x = number_or(p, key, f64::from(default), cmd)?;
+    if x.fract() != 0.0 || !COUNTS.contains(&x) {
+        let (min, max) = (COUNTS.start(), COUNTS.end());
+        return Err(bad(cmd, format!("`{key}` must be a whole number between {min} and {max} (got {x})")));
+    }
+    Ok(x as u32)
+}
+
+/// The size `p` gives for `key`: a number that is not negative.
+fn size(p: &Value, key: &str, cmd: &str) -> Result<f64> {
+    not_negative(f64_req(p, key, cmd)?, key, cmd)
+}
+
+/// The size `p` gives for `key`, or `default` when `p` leaves it out or gives null.
+fn size_or(p: &Value, key: &str, default: f64, cmd: &str) -> Result<f64> {
+    not_negative(number_or(p, key, default, cmd)?, key, cmd)
+}
+
+fn not_negative(x: f64, key: &str, cmd: &str) -> Result<f64> {
+    if x < 0.0 {
+        return Err(bad(cmd, format!("`{key}` must be a number not below 0")));
+    }
+    Ok(x)
+}
+
+/// The four corner radii `p` gives as `radii` ([tl, tr, br, bl]), or `None` when `p` leaves it out
+/// or gives null. Anything but four numbers that are not negative is an error.
+fn radii_param(p: &Value, cmd: &str) -> Result<Option<[f64; 4]>> {
+    let key = "radii";
+    match p.get(key) {
+        None | Some(Value::Null) => Ok(None),
+        Some(v) => {
+            let four = v.as_array().filter(|a| a.len() == 4).and_then(|a| {
+                let mut out = [0.0; 4];
+                for (slot, item) in out.iter_mut().zip(a) {
+                    *slot = item.as_f64().filter(|r| *r >= 0.0)?;
+                }
+                Some(out)
+            });
+            four.map(Some).ok_or_else(|| bad(cmd, format!("`{key}` must be four numbers not below 0: [tl, tr, br, bl]")))
+        }
+    }
+}
+
+/// The mode `p` gives as `arcMode`, or `None` when `p` leaves it out or gives null. Any other
+/// value than one of [`ARC_MODES`] (or `slice` or `open`) is an error.
+fn arc_mode(p: &Value, cmd: &str) -> Result<Option<shapes::EllipseMode>> {
+    let key = "arcMode";
+    match p.get(key) {
+        None | Some(Value::Null) => Ok(None),
+        Some(v) => v.as_str().and_then(parse_mode).map(Some).ok_or_else(|| bad(cmd, format!("`{key}` must be one of {}", ARC_MODES.join(", ")))),
+    }
+}
+
+fn parse_arc_params(p: &Value, cmd: &str) -> Result<((f64, f64), shapes::EllipseMode)> {
     let start = f64_or(p, "startAngle", 0.0);
     let end = f64_or(p, "endAngle", 360.0);
-    let mode = match str_param(p, "arcMode") {
-        Some("pie" | "slice") => shapes::EllipseMode::Slice,
-        Some("chord") => shapes::EllipseMode::Chord,
-        Some("arc" | "open") => shapes::EllipseMode::Arc,
-        _ => shapes::EllipseMode::Whole,
-    };
+    let mode = arc_mode(p, cmd)?.unwrap_or(shapes::EllipseMode::Whole);
     let span = (end - start).rem_euclid(360.0);
     let pie = if mode == shapes::EllipseMode::Whole && (span < 1e-6 || (span - 360.0).abs() < 1e-6) { (0.0, 360.0) } else { (start, end) };
-    (pie, mode)
+    Ok((pie, mode))
 }
 
 fn rect_of(p: &Value, c: &str) -> Result<Rect> {
     let x = f64_req(p, "x", c)?;
     let y = f64_req(p, "y", c)?;
-    let w = f64_req(p, "width", c)?;
-    let h = f64_req(p, "height", c)?;
-    Ok(Rect::new(x, y, x + w.abs(), y + h.abs()).abs())
+    let w = size(p, "width", c)?;
+    let h = size(p, "height", c)?;
+    Ok(Rect::new(x, y, x + w, y + h))
 }
 
 fn rect_xf(r: Rect, rot: f64) -> Affine {
@@ -141,18 +222,9 @@ fn rectangle(s: &mut Session, p: &Value) -> Result<Value> {
     let c = "addon.shapes.rectangle";
     check_numbers(p, &["radius", "startAngle", "endAngle", "rotation"], c)?;
     let r = rect_of(p, c)?;
-    let radius = f64_or(p, "radius", 0.0).max(0.0);
-    let mut radii = [radius; 4];
-    if let Some(arr) = p.get("radii").and_then(Value::as_array)
-        && arr.len() == 4
-    {
-        for (i, item) in arr.iter().enumerate() {
-            if let Some(val) = item.as_f64().filter(|n| n.is_finite()) {
-                radii[i] = val.max(0.0);
-            }
-        }
-    }
-    let (pie, arc_mode) = parse_arc_params(p);
+    let radius = size_or(p, "radius", 0.0, c)?;
+    let radii = radii_param(p, c)?.unwrap_or([radius; 4]);
+    let (pie, arc_mode) = parse_arc_params(p, c)?;
     let xf = rect_xf(r, f64_or(p, "rotation", 0.0));
     let live = LiveShape::Rectangle { w: r.width(), h: r.height(), radii, kinds: Default::default(), radii_relative: false, xf };
     let cs = CustomShape::Rectangle { w: r.width(), h: r.height(), radii, kinds: Default::default(), radii_relative: false, xf, pie, arc_mode };
@@ -164,7 +236,7 @@ fn ellipse(s: &mut Session, p: &Value) -> Result<Value> {
     let c = "addon.shapes.ellipse";
     check_numbers(p, &["startAngle", "endAngle", "rotation"], c)?;
     let r = rect_of(p, c)?;
-    let (pie, arc_mode) = parse_arc_params(p);
+    let (pie, arc_mode) = parse_arc_params(p, c)?;
     let xf = rect_xf(r, f64_or(p, "rotation", 0.0));
     let live = LiveShape::Ellipse { w: r.width(), h: r.height(), pie, xf };
     let cs = CustomShape::Ellipse { w: r.width(), h: r.height(), pie, arc_mode, xf };
@@ -174,13 +246,13 @@ fn ellipse(s: &mut Session, p: &Value) -> Result<Value> {
 fn polygon(s: &mut Session, p: &Value) -> Result<Value> {
     let c = "addon.shapes.polygon";
     let center = Point::new(f64_req(p, "cx", c)?, f64_req(p, "cy", c)?);
-    let r = f64_req(p, "radius", c)?.abs();
+    let r = size(p, "radius", c)?;
     check_numbers(p, &["sides", "rotation", "rounded", "randomized", "startAngle", "endAngle"], c)?;
-    let sides = (f64_or(p, "sides", 6.0).round() as i64).clamp(3, 1000) as u32;
+    let sides = count(p, "sides", 6, c)?;
     let rot = f64_or(p, "rotation", 0.0);
-    let rounded = f64_or(p, "rounded", 0.0).clamp(-10.0, 10.0);
-    let randomized = f64_or(p, "randomized", 0.0).clamp(-10.0, 10.0);
-    let (pie, arc_mode) = parse_arc_params(p);
+    let rounded = ranged(p, "rounded", 0.0, &ROUNDING, c)?;
+    let randomized = ranged(p, "randomized", 0.0, &ROUNDING, c)?;
+    let (pie, arc_mode) = parse_arc_params(p, c)?;
     let xf = Affine::translate(center.to_vec2()) * vectorcraft_geom::rotate_deg(rot);
     let live = LiveShape::Polygon { radius: r, sides, xf, radii: vec![], kinds: vec![], radii_relative: false };
     let cs = CustomShape::Polygon {
@@ -202,16 +274,17 @@ fn polygon(s: &mut Session, p: &Value) -> Result<Value> {
 fn star(s: &mut Session, p: &Value) -> Result<Value> {
     let c = "addon.shapes.star";
     let center = Point::new(f64_req(p, "cx", c)?, f64_req(p, "cy", c)?);
-    let r1 = f64_req(p, "radius1", c)?.abs();
+    let r1 = size(p, "radius1", c)?;
     check_numbers(p, &["radius2", "points", "rotation", "rounded", "randomized", "startAngle", "endAngle"], c)?;
-    let r2 = f64_or(p, "radius2", r1 / 2.0).abs();
-    let points = (f64_or(p, "points", 5.0).round() as i64).clamp(3, 1000) as u32;
+    // The inner radius is a fraction of the outer one, in `SPOKE_RATIO`.
+    let r2 = ranged(p, "radius2", r1 / 2.0, &(r1 * SPOKE_RATIO.start()..=r1 * SPOKE_RATIO.end()), c)?;
+    let points = count(p, "points", 5, c)?;
     let rot = f64_or(p, "rotation", 0.0);
-    let rounded = f64_or(p, "rounded", 0.0).clamp(-10.0, 10.0);
-    let randomized = f64_or(p, "randomized", 0.0).clamp(-10.0, 10.0);
-    let (pie, arc_mode) = parse_arc_params(p);
+    let rounded = ranged(p, "rounded", 0.0, &ROUNDING, c)?;
+    let randomized = ranged(p, "randomized", 0.0, &ROUNDING, c)?;
+    let (pie, arc_mode) = parse_arc_params(p, c)?;
     let xf = Affine::translate(center.to_vec2()) * vectorcraft_geom::rotate_deg(rot);
-    let ratio = if r1 > 1e-9 { (r2 / r1).clamp(0.01, 1.0) } else { 0.5 };
+    let ratio = if r1 > 1e-9 { (r2 / r1).clamp(*SPOKE_RATIO.start(), *SPOKE_RATIO.end()) } else { 0.5 };
     let cs = CustomShape::Polygon {
         radius: r1,
         sides: points,
@@ -231,12 +304,12 @@ fn star(s: &mut Session, p: &Value) -> Result<Value> {
 fn spiral(s: &mut Session, p: &Value) -> Result<Value> {
     let c = "addon.shapes.spiral";
     let center = Point::new(f64_req(p, "cx", c)?, f64_req(p, "cy", c)?);
-    let r = f64_req(p, "radius", c)?.abs();
+    let r = size(p, "radius", c)?;
     check_numbers(p, &["turns", "divergence", "innerRadius"], c)?;
     check_switches(p, &["clockwise"], c)?;
-    let turns = f64_or(p, "turns", 3.0).clamp(0.01, 1024.0);
-    let divergence = f64_or(p, "divergence", 1.0).clamp(0.0, 1000.0);
-    let inner_radius = f64_or(p, "innerRadius", 0.0).clamp(0.0, 0.999);
+    let turns = ranged(p, "turns", 3.0, &TURNS, c)?;
+    let divergence = ranged(p, "divergence", 1.0, &DIVERGENCE, c)?;
+    let inner_radius = ranged(p, "innerRadius", 0.0, &INNER_RADIUS, c)?;
     let clockwise = bool_or(p, "clockwise", true);
     let cs = CustomShape::Spiral { center, radius: r, turns, divergence, inner_radius, clockwise };
     insert_custom(s, "Spiral", None, cs)
@@ -299,24 +372,54 @@ fn configure(s: &mut Session, p: &Value) -> Result<Value> {
         c,
     )?;
     check_switches(p, &["isStar", "parallelX", "parallelY", "parallelZ", "reset"], c)?;
+    check_configure(p, c)?;
     let ids = targets(s, p)?;
     let reset = bool_or(p, "reset", false);
     let spiral_hint = p.get("turns").is_some() || p.get("divergence").is_some() || p.get("innerRadius").is_some();
+    // The shapes the params change, worked out first so that a call that changes nothing records
+    // no undo step.
+    let changes: Vec<(NodeId, CustomShape)> = {
+        let doc = &s.doc()?.doc;
+        ids.into_iter()
+            .filter_map(|id| {
+                let n = doc.node(id)?;
+                let before = CustomShape::read_for_update(n, spiral_hint)?;
+                let mut cs = before.clone();
+                let stored = CustomShape::read(n).is_some();
+                (apply_shape_params(&mut cs, p, reset) && (cs != before || !stored)).then_some((id, cs))
+            })
+            .collect()
+    };
+    if changes.is_empty() {
+        return Ok(json!({ "updated": 0 }));
+    }
     let updated = s.edit("Live Shape", |d, _| {
         let mut count = 0usize;
-        for id in ids {
-            let Some(n) = d.node_mut(id) else { continue };
-            let Some(mut cs) = CustomShape::read_for_update(n, spiral_hint) else { continue };
-            if apply_shape_params(&mut cs, p, reset) {
-                cs.write_to_node(n);
-                count += 1;
-            }
+        for (id, cs) in &changes {
+            let Some(n) = d.node_mut(*id) else { continue };
+            cs.write_to_node(n);
+            count += 1;
         }
         Ok(count)
     })?;
     Ok(json!({ "updated": updated }))
 }
 
+/// Error unless every bounded value `p` gives is in its range, before any shape changes.
+fn check_configure(p: &Value, c: &str) -> Result<()> {
+    size_or(p, "radius", 0.0, c)?;
+    radii_param(p, c)?;
+    arc_mode(p, c)?;
+    count(p, "sides", 6, c)?;
+    ranged(p, "spokeRatio", 0.5, &SPOKE_RATIO, c)?;
+    ranged(p, "rounded", 0.0, &ROUNDING, c)?;
+    ranged(p, "randomized", 0.0, &ROUNDING, c)?;
+    ranged(p, "turns", 3.0, &TURNS, c)?;
+    ranged(p, "divergence", 1.0, &DIVERGENCE, c)?;
+    ranged(p, "innerRadius", 0.0, &INNER_RADIUS, c)?;
+    Ok(())
+}
+
 fn num_param(p: &Value, k: &str) -> Option<f64> {
     p.get(k).and_then(Value::as_f64).filter(|v| v.is_finite())
 }
@@ -331,8 +434,8 @@ fn apply_arc_params(p: &Value, pie: &mut (f64, f64), arc_mode: &mut shapes::Elli
         pie.1 = a1.rem_euclid(360.0);
         changed = true;
     }
-    if let Some(m) = str_param(p, "arcMode") {
-        *arc_mode = parse_mode(m);
+    if let Some(m) = str_param(p, "arcMode").and_then(parse_mode) {
+        *arc_mode = m;
         if *arc_mode == shapes::EllipseMode::Whole {
             *pie = (0.0, 360.0);
         } else if (pie.1 - pie.0).abs() < 1e-6 || ((pie.1 - pie.0).abs() - 360.0).abs() < 1e-6 {
@@ -351,19 +454,14 @@ fn apply_rect_params(p: &Value, reset: bool, max_r: f64, radii: &mut [f64; 4], p
         *arc_mode = shapes::EllipseMode::Whole;
         changed = true;
     }
+    // A radius larger than half the rectangle's shorter side is fitted to that size.
     if let Some(r) = num_param(p, "radius") {
         *radii = [r.clamp(0.0, max_r); 4];
         changed = true;
     }
-    if let Some(arr) = p.get("radii").and_then(Value::as_array)
-        && arr.len() == 4
-    {
-        for (i, v) in arr.iter().enumerate() {
-            if let Some(r) = v.as_f64().filter(|x| x.is_finite()) {
-                radii[i] = r.clamp(0.0, max_r);
-                changed = true;
-            }
-        }
+    if let Ok(Some(four)) = radii_param(p, "addon.shapes.configure") {
+        *radii = four.map(|r| r.clamp(0.0, max_r));
+        changed = true;
     }
     changed | apply_arc_params(p, pie, arc_mode)
 }
@@ -378,8 +476,9 @@ fn apply_poly_params(p: &Value, reset: bool, sides: &mut u32, spoke_ratio: &mut
         }
         changed = true;
     }
-    if let Some(n_sides) = p.get("sides").and_then(Value::as_u64) {
-        *sides = (n_sides as u32).clamp(3, 1000);
+    // `check_configure` has refused values outside their ranges.
+    if let Some(n_sides) = num_param(p, "sides") {
+        *sides = n_sides as u32;
         changed = true;
     }
     if let Some(star) = p.get("isStar").and_then(Value::as_bool) {
@@ -387,15 +486,15 @@ fn apply_poly_params(p: &Value, reset: bool, sides: &mut u32, spoke_ratio: &mut
         changed = true;
     }
     if let Some(sr) = num_param(p, "spokeRatio") {
-        *spoke_ratio = Some(sr.clamp(0.01, 1.0));
+        *spoke_ratio = Some(sr);
         changed = true;
     }
     if let Some(rnd) = num_param(p, "rounded") {
-        *rounded = rnd.clamp(-10.0, 10.0);
+        *rounded = rnd;
         changed = true;
     }
     if let Some(rand) = num_param(p, "randomized") {
-        *randomized = rand.clamp(-10.0, 10.0);
+        *randomized = rand;
         changed = true;
     }
     changed
@@ -429,15 +528,15 @@ fn apply_shape_params(cs: &mut CustomShape, p: &Value, reset: bool) -> bool {
                 changed = true;
             }
             if let Some(t) = num_param(p, "turns") {
-                *turns = t.clamp(0.01, 1024.0);
+                *turns = t;
                 changed = true;
             }
             if let Some(div) = num_param(p, "divergence") {
-                *divergence = div.clamp(0.0, 1000.0);
+                *divergence = div;
                 changed = true;
             }
             if let Some(ir) = num_param(p, "innerRadius") {
-                *inner_radius = ir.clamp(0.0, 0.999);
+                *inner_radius = ir;
                 changed = true;
             }
             changed
@@ -470,11 +569,12 @@ fn apply_shape_params(cs: &mut CustomShape, p: &Value, reset: bool) -> bool {
     }
 }
 
-fn parse_mode(m: &str) -> shapes::EllipseMode {
+fn parse_mode(m: &str) -> Option<shapes::EllipseMode> {
     match m {
-        "pie" | "slice" => shapes::EllipseMode::Slice,
-        "chord" => shapes::EllipseMode::Chord,
-        "arc" | "open" => shapes::EllipseMode::Arc,
-        _ => shapes::EllipseMode::Whole,
+        "whole" => Some(shapes::EllipseMode::Whole),
+        "pie" | "slice" => Some(shapes::EllipseMode::Slice),
+        "chord" => Some(shapes::EllipseMode::Chord),
+        "arc" | "open" => Some(shapes::EllipseMode::Arc),
+        _ => None,
     }
 }
diff --git a/crates/engine/src/cmd/addons/shapes/tests.rs b/crates/engine/src/cmd/addons/shapes/tests.rs
index 793ae6074c..bc5f1359e2 100644
--- a/crates/engine/src/cmd/addons/shapes/tests.rs
+++ b/crates/engine/src/cmd/addons/shapes/tests.rs
@@ -135,3 +135,169 @@ fn addon_shapes_commands_and_format_roundtrip_preserve_paths() {
         assert_eq!(CustomShape::read(a), CustomShape::read(b));
     }
 }
+
+fn id_of(s: &mut Session, cmd: &str, p: serde_json::Value) -> NodeId {
+    NodeId(s.execute(cmd, &p).unwrap_or_else(|e| panic!("{cmd} {p}: {e}"))["id"].as_u64().unwrap())
+}
+
+fn shape_of(s: &Session, id: NodeId) -> CustomShape {
+    CustomShape::read(s.doc().unwrap().doc.node(id).unwrap()).unwrap()
+}
+
+/// Runs `cmd` with `p`, which must fail with `msg` and leave the document and its history as they
+/// were.
+fn refused(s: &mut Session, cmd: &str, p: serde_json::Value, msg: &str) {
+    let saved = vectorcraft_format::save(&s.doc().unwrap().doc, false);
+    let undo = s.doc().unwrap().history.undo.len();
+    let e = s.execute(cmd, &p).map(|v| v.to_string()).unwrap_err().to_string();
+    assert!(e.contains(msg), "{cmd} {p}: {e}");
+    assert_eq!(s.doc().unwrap().history.undo.len(), undo, "{cmd} {p}");
+    assert_eq!(vectorcraft_format::save(&s.doc().unwrap().doc, false), saved, "{cmd} {p}");
+}
+
+#[test]
+fn polygon_and_star_refuse_counts_that_are_not_whole_numbers_from_3_to_1000() {
+    let mut s = new_session();
+    for n in [json!(2.5), json!(2), json!(0), json!(-6), json!(1000.5), json!(5000), json!(4_294_967_299u64)] {
+        let x = n.as_f64().unwrap();
+        let p = json!({"cx": 0.0, "cy": 0.0, "radius": 10.0, "sides": n});
+        refused(&mut s, "addon.shapes.polygon", p, &format!("`sides` must be a whole number between 3 and 1000 (got {x})"));
+        let p = json!({"cx": 0.0, "cy": 0.0, "radius1": 10.0, "points": n});
+        refused(&mut s, "addon.shapes.star", p, &format!("`points` must be a whole number between 3 and 1000 (got {x})"));
+    }
+    refused(&mut s, "addon.shapes.polygon", json!({"cx": 0.0, "cy": 0.0, "radius": 10.0, "sides": "6"}), "`sides` must be a number");
+    refused(&mut s, "addon.shapes.star", json!({"cx": 0.0, "cy": 0.0, "radius1": 10.0, "points": [5]}), "`points` must be a number");
+
+    // The ends of the range are taken as given, and an omitted or null count is the default.
+    for (n, want) in [(json!(3), 3), (json!(1000), 1000), (json!(7.0), 7), (json!(null), 6)] {
+        let id = id_of(&mut s, "addon.shapes.polygon", json!({"cx": 0.0, "cy": 0.0, "radius": 10.0, "sides": n}));
+        assert!(matches!(shape_of(&s, id), CustomShape::Polygon { sides, spoke_ratio: None, .. } if sides == want), "{n}");
+    }
+    let id = id_of(&mut s, "addon.shapes.polygon", json!({"cx": 0.0, "cy": 0.0, "radius": 10.0}));
+    assert!(matches!(shape_of(&s, id), CustomShape::Polygon { sides: 6, .. }));
+    for (n, want) in [(json!(3), 3), (json!(1000), 1000), (json!(null), 5)] {
+        let id = id_of(&mut s, "addon.shapes.star", json!({"cx": 0.0, "cy": 0.0, "radius1": 10.0, "points": n}));
+        assert!(matches!(shape_of(&s, id), CustomShape::Polygon { sides, spoke_ratio: Some(_), .. } if sides == want), "{n}");
+    }
+}
+
+#[test]
+fn shapes_refuse_numbers_outside_their_ranges() {
+    let mut s = new_session();
+    let poly = json!({"cx": 0.0, "cy": 0.0, "radius": 10.0});
+    let star = json!({"cx": 0.0, "cy": 0.0, "radius1": 10.0});
+    let spiral = json!({"cx": 0.0, "cy": 0.0, "radius": 10.0});
+    let with = |base: &serde_json::Value, key: &str, v: f64| {
+        let mut p = base.clone();
+        p[key] = json!(v);
+        p
+    };
+    for (cmd, base, key, bad, good) in [
+        ("addon.shapes.polygon", &poly, "rounded", [-10.5, 10.5], [-10.0, 10.0]),
+        ("addon.shapes.polygon", &poly, "randomized", [-11.0, 10.01], [-10.0, 10.0]),
+        ("addon.shapes.star", &star, "rounded", [-10.5, 10.5], [-10.0, 10.0]),
+        ("addon.shapes.star", &star, "randomized", [-11.0, 10.01], [-10.0, 10.0]),
+        ("addon.shapes.star", &star, "radius2", [0.05, 11.0], [0.1, 10.0]),
+        ("addon.shapes.spiral", &spiral, "turns", [0.0, 1024.5], [0.01, 1024.0]),
+        ("addon.shapes.spiral", &spiral, "divergence", [-0.1, 1000.5], [0.0, 1000.0]),
+        ("addon.shapes.spiral", &spiral, "innerRadius", [-0.1, 1.0], [0.0, 0.999]),
+    ] {
+        let (min, max) = (good[0], good[1]);
+        for x in bad {
+            refused(&mut s, cmd, with(base, key, x), &format!("`{key}` must be between {min} and {max} (got {x})"));
+        }
+        for x in good {
+            s.execute(cmd, &with(base, key, x)).unwrap_or_else(|e| panic!("{cmd} {key} {x}: {e}"));
+        }
+    }
+
+    // Sizes are not negative.
+    for (cmd, p, key) in [
+        ("addon.shapes.polygon", json!({"cx": 0.0, "cy": 0.0, "radius": -10.0}), "radius"),
+        ("addon.shapes.star", json!({"cx": 0.0, "cy": 0.0, "radius1": -10.0}), "radius1"),
+        ("addon.shapes.spiral", json!({"cx": 0.0, "cy": 0.0, "radius": -10.0}), "radius"),
+        ("addon.shapes.rectangle", json!({"x": 0.0, "y": 0.0, "width": -10.0, "height": 10.0}), "width"),
+        ("addon.shapes.rectangle", json!({"x": 0.0, "y": 0.0, "width": 10.0, "height": 10.0, "radius": -1.0}), "radius"),
+        ("addon.shapes.ellipse", json!({"x": 0.0, "y": 0.0, "width": 10.0, "height": -10.0}), "height"),
+        ("addon.shapes.box3d", json!({"x": 0.0, "y": 0.0, "width": -10.0, "height": 10.0}), "width"),
+    ] {
+        refused(&mut s, cmd, p, &format!("`{key}` must be a number not below 0"));
+    }
+
+    // Corner radii are four numbers that are not negative.
+    for radii in [json!([1.0, 2.0, 3.0]), json!([1.0, 2.0, 3.0, -4.0]), json!([1.0, 2.0, 3.0, "4"]), json!(4.0)] {
+        let p = json!({"x": 0.0, "y": 0.0, "width": 100.0, "height": 80.0, "radii": radii});
+        refused(&mut s, "addon.shapes.rectangle", p, "`radii` must be four numbers not below 0: [tl, tr, br, bl]");
+    }
+
+    // An arc mode is one of the names the commands take.
+    for mode in [json!("slices"), json!(""), json!(3)] {
+        let p = json!({"x": 0.0, "y": 0.0, "width": 100.0, "height": 80.0, "arcMode": mode});
+        refused(&mut s, "addon.shapes.rectangle", p.clone(), "`arcMode` must be one of whole, pie, chord, arc");
+        refused(&mut s, "addon.shapes.ellipse", p, "`arcMode` must be one of whole, pie, chord, arc");
+    }
+    for mode in ["whole", "pie", "slice", "chord", "arc", "open"] {
+        s.execute("addon.shapes.ellipse", &json!({"x": 0.0, "y": 0.0, "width": 100.0, "height": 80.0, "arcMode": mode})).unwrap();
+    }
+}
+
+#[test]
+fn configure_refuses_values_outside_their_ranges_before_changing_any_shape() {
+    let mut s = new_session();
+    let rect = id_of(&mut s, "addon.shapes.rectangle", json!({"x": 0.0, "y": 0.0, "width": 100.0, "height": 80.0, "radius": 4.0}));
+    let poly = id_of(&mut s, "addon.shapes.polygon", json!({"cx": 50.0, "cy": 50.0, "radius": 40.0, "sides": 5}));
+    let spiral = id_of(&mut s, "addon.shapes.spiral", json!({"cx": 60.0, "cy": 60.0, "radius": 45.0}));
+    let ids = json!([rect.0, poly.0, spiral.0]);
+    let cfg = |key: &str, v: serde_json::Value| json!({"ids": ids.clone(), key: v});
+    let c = "addon.shapes.configure";
+    for n in [json!(2.5), json!(2), json!(-1), json!(5000), json!(4_294_967_299u64)] {
+        let x = n.as_f64().unwrap();
+        refused(&mut s, c, cfg("sides", n), &format!("`sides` must be a whole number between 3 and 1000 (got {x})"));
+    }
+    for (key, bad, min, max) in [
+        ("spokeRatio", [0.0, 1.5], 0.01, 1.0),
+        ("rounded", [-10.5, 11.0], -10.0, 10.0),
+        ("randomized", [-11.0, 10.5], -10.0, 10.0),
+        ("turns", [0.0, 2000.0], 0.01, 1024.0),
+        ("divergence", [-1.0, 1000.5], 0.0, 1000.0),
+        ("innerRadius", [-0.5, 1.0], 0.0, 0.999),
+    ] {
+        for x in bad {
+            refused(&mut s, c, cfg(key, json!(x)), &format!("`{key}` must be between {min} and {max} (got {x})"));
+        }
+    }
+    refused(&mut s, c, cfg("radius", json!(-1.0)), "`radius` must be a number not below 0");
+    for radii in [json!([1.0, 2.0]), json!([1.0, 2.0, 3.0, -1.0]), json!("4")] {
+        refused(&mut s, c, cfg("radii", radii), "`radii` must be four numbers not below 0: [tl, tr, br, bl]");
+    }
+    refused(&mut s, c, cfg("arcMode", json!("bogus")), "`arcMode` must be one of whole, pie, chord, arc");
+    // A valid value next to a refused one changes no shape either.
+    refused(&mut s, c, json!({"ids": ids.clone(), "sides": 8, "turns": 0.0}), "`turns` must be between 0.01 and 1024 (got 0)");
+
+    // In range, the values are taken as given; a radius larger than the rectangle takes is fitted to it.
+    s.execute(c, &json!({"ids": [poly.0], "sides": 1000, "rounded": -10.0, "randomized": 10.0})).unwrap();
+    assert!(matches!(shape_of(&s, poly), CustomShape::Polygon { sides: 1000, rounded, randomized, .. } if rounded == -10.0 && randomized == 10.0));
+    s.execute(c, &json!({"ids": [poly.0], "sides": 3})).unwrap();
+    assert!(matches!(shape_of(&s, poly), CustomShape::Polygon { sides: 3, .. }));
+    s.execute(c, &json!({"ids": [spiral.0], "turns": 1024.0, "divergence": 0.0, "innerRadius": 0.999})).unwrap();
+    assert!(
+        matches!(shape_of(&s, spiral), CustomShape::Spiral { turns, divergence, inner_radius, .. } if turns == 1024.0 && divergence == 0.0 && inner_radius == 0.999)
+    );
+    s.execute(c, &json!({"ids": [rect.0], "radius": 1000.0})).unwrap();
+    assert!(matches!(shape_of(&s, rect), CustomShape::Rectangle { radii, .. } if radii == [40.0; 4]));
+}
+
+#[test]
+fn configure_records_no_undo_step_when_nothing_changes() {
+    let mut s = new_session();
+    let poly = id_of(&mut s, "addon.shapes.polygon", json!({"cx": 50.0, "cy": 50.0, "radius": 40.0, "sides": 5, "rounded": 0.5}));
+    let undo = s.doc().unwrap().history.undo.len();
+    let r = s.execute("addon.shapes.configure", &json!({"ids": [poly.0], "sides": 5, "rounded": 0.5})).unwrap();
+    assert_eq!(r["updated"], 0);
+    assert_eq!(s.doc().unwrap().history.undo.len(), undo);
+
+    let r = s.execute("addon.shapes.configure", &json!({"ids": [poly.0], "sides": 6})).unwrap();
+    assert_eq!(r["updated"], 1);
+    assert_eq!(s.doc().unwrap().history.undo.len(), undo + 1);
+    assert!(matches!(shape_of(&s, poly), CustomShape::Polygon { sides: 6, .. }));
+}
diff --git a/crates/ui-egui/src/i18n/ca.tsv b/crates/ui-egui/src/i18n/ca.tsv
index 4ab4a2bfdc..f4729ee62e 100644
--- a/crates/ui-egui/src/i18n/ca.tsv
+++ b/crates/ui-egui/src/i18n/ca.tsv
@@ -5263,6 +5263,7 @@ digits	Malayalam	Malaiàlam
 @msg	`{key}` must be a #rrggbb colour	`{key}` ha de ser un color #rrggbb
 @msg	`{key}` must be a number	`{key}` ha de ser un nombre
 @msg	`{key}` must be a number not below 0	`{key}` ha de ser un nombre no inferior a 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` han de ser quatre nombres no inferiors a 0: [tl, tr, br, bl]
 @msg	`{key}` must be a number, not {v}	`{key}` ha de ser un nombre, no {v}
 @msg	`{key}` must be a string	`{key}` ha de ser una cadena
 @msg	`{key}` must be a profile name or null	`{key}` ha de ser un nom de perfil o null
diff --git a/crates/ui-egui/src/i18n/cs.tsv b/crates/ui-egui/src/i18n/cs.tsv
index 6edd8ba3be..bca8462334 100644
--- a/crates/ui-egui/src/i18n/cs.tsv
+++ b/crates/ui-egui/src/i18n/cs.tsv
@@ -4767,6 +4767,7 @@ imageTrace	Outline	Obrys
 @msg	`select` must be true or false	`select` musí být true nebo false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` a `maxAnchors` musí být celá čísla
 @msg	`{key}` must be a number not below 0	`{key}` musí být číslo nejméně 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` musí být čtyři čísla nejméně 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` musí být [x, y, width, height]: čtyři konečná čísla, šířka a výška nesmí být záporné
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` je větší než `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	zadejte alespoň jeden z parametrů `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/de.tsv b/crates/ui-egui/src/i18n/de.tsv
index 8fe1734165..3ea50f2c42 100644
--- a/crates/ui-egui/src/i18n/de.tsv
+++ b/crates/ui-egui/src/i18n/de.tsv
@@ -4381,6 +4381,7 @@ theme	Appearance	Erscheinungsbild
 @msg	`select` must be true or false	`select` muss true oder false sein
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` und `maxAnchors` müssen ganze Zahlen sein
 @msg	`{key}` must be a number not below 0	`{key}` muss eine Zahl nicht kleiner als 0 sein
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` muss aus vier Zahlen nicht kleiner als 0 bestehen: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` muss [x, y, width, height] sein: vier endliche Zahlen, Breite und Höhe nicht negativ
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` ist größer als `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	geben Sie mindestens einen der Parameter `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors` an
diff --git a/crates/ui-egui/src/i18n/el.tsv b/crates/ui-egui/src/i18n/el.tsv
index 921eecb266..6f312a27eb 100644
--- a/crates/ui-egui/src/i18n/el.tsv
+++ b/crates/ui-egui/src/i18n/el.tsv
@@ -2528,6 +2528,7 @@ axis	Both	Και τα δύο
 @msg	`select` must be true or false	Το `select` πρέπει να είναι true ή false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	Τα `minAnchors` και `maxAnchors` πρέπει να είναι ακέραιοι αριθμοί
 @msg	`{key}` must be a number not below 0	Το `{key}` πρέπει να είναι αριθμός όχι μικρότερος από 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	Το `{key}` πρέπει να είναι τέσσερις αριθμοί όχι μικρότεροι από 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	Το `{key}` πρέπει να είναι [x, y, width, height]: τέσσερις πεπερασμένοι αριθμοί, με πλάτος και ύψος όχι αρνητικά
 @msg	`{min_key}` is greater than `{max_key}`	Το `{min_key}` είναι μεγαλύτερο από το `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	δώστε τουλάχιστον ένα από τα `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/es.tsv b/crates/ui-egui/src/i18n/es.tsv
index f3d98e0518..b8c7791951 100644
--- a/crates/ui-egui/src/i18n/es.tsv
+++ b/crates/ui-egui/src/i18n/es.tsv
@@ -4458,6 +4458,7 @@ axis	Both	Ambos
 @msg	`select` must be true or false	`select` debe ser true o false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` y `maxAnchors` deben ser números enteros
 @msg	`{key}` must be a number not below 0	`{key}` debe ser un número no inferior a 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` debe ser cuatro números no inferiores a 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` debe ser [x, y, width, height]: cuatro números finitos, con anchura y altura no negativas
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` es mayor que `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	indica al menos uno de `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/fi.tsv b/crates/ui-egui/src/i18n/fi.tsv
index 8631ff3e0e..82e6a92f68 100644
--- a/crates/ui-egui/src/i18n/fi.tsv
+++ b/crates/ui-egui/src/i18n/fi.tsv
@@ -4681,6 +4681,7 @@ imageTrace	Outline	Ääriviiva
 @msg	`select` must be true or false	`select` on oltava true tai false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` ja `maxAnchors` on oltava kokonaislukuja
 @msg	`{key}` must be a number not below 0	`{key}` on oltava luku, joka on vähintään 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` on oltava neljä lukua, jotka ovat vähintään 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` on oltava [x, y, width, height]: neljä äärellistä lukua, joista leveys ja korkeus eivät ole negatiivisia
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` on suurempi kuin `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	anna vähintään yksi parametreista `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/fr.tsv b/crates/ui-egui/src/i18n/fr.tsv
index 61854baa63..ec1229c764 100644
--- a/crates/ui-egui/src/i18n/fr.tsv
+++ b/crates/ui-egui/src/i18n/fr.tsv
@@ -4447,6 +4447,7 @@ axis	Both	Les deux
 @msg	`select` must be true or false	`select` doit valoir true ou false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` et `maxAnchors` doivent être des nombres entiers
 @msg	`{key}` must be a number not below 0	`{key}` doit être un nombre supérieur ou égal à 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` doit être quatre nombres supérieurs ou égaux à 0 : [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` doit être [x, y, width, height] : quatre nombres finis, largeur et hauteur non négatives
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` est supérieur à `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	indiquez au moins l’un des paramètres `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/hi.tsv b/crates/ui-egui/src/i18n/hi.tsv
index c99e152ce9..8bf682fa4f 100644
--- a/crates/ui-egui/src/i18n/hi.tsv
+++ b/crates/ui-egui/src/i18n/hi.tsv
@@ -5913,6 +5913,7 @@ antiAlias	Sharp	शार्प
 @msg	`{key}` must be a number	`{key}` एक संख्या होना चाहिए
 @msg	`{key}` must be a number {_1}..{_2}	`{key}` {_1}..{_2} की एक संख्या होना चाहिए
 @msg	`{key}` must be a number not below 0	`{key}` 0 से कम नहीं होने वाली संख्या होना चाहिए
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` 0 से कम नहीं होने वाली चार संख्याएँ होनी चाहिए: [tl, tr, br, bl]
 @msg	`{key}` must be a number, not {v}	`{key}` एक संख्या होना चाहिए, {v} नहीं
 @msg	`{key}` must be a profile name or null	`{key}` को प्रोफ़ाइल नाम या null होना चाहिए
 @msg	`{key}` must be a string	`{key}` एक स्ट्रिंग होना चाहिए
diff --git a/crates/ui-egui/src/i18n/hu.tsv b/crates/ui-egui/src/i18n/hu.tsv
index 8dd19c2cd7..16315f373d 100644
--- a/crates/ui-egui/src/i18n/hu.tsv
+++ b/crates/ui-egui/src/i18n/hu.tsv
@@ -4887,6 +4887,7 @@ imageTrace	Outline	Körvonal
 @msg	`select` must be true or false	`select`: true vagy false kell
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` és `maxAnchors`: egész szám kell
 @msg	`{key}` must be a number not below 0	`{key}`: legalább 0 értékű szám kell
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}`: négy legalább 0 értékű szám kell: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}`: [x, y, width, height] kell, négy véges szám, a szélesség és a magasság nem negatív
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` nagyobb, mint `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	adj meg legalább egyet ezek közül: `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/it.tsv b/crates/ui-egui/src/i18n/it.tsv
index fee7dbd594..db11d917a9 100644
--- a/crates/ui-egui/src/i18n/it.tsv
+++ b/crates/ui-egui/src/i18n/it.tsv
@@ -4510,6 +4510,7 @@ axis	Both	Entrambi
 @msg	`select` must be true or false	`select` deve essere true o false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` e `maxAnchors` devono essere numeri interi
 @msg	`{key}` must be a number not below 0	`{key}` deve essere un numero non inferiore a 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` deve essere quattro numeri non inferiori a 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` deve essere [x, y, width, height]: quattro numeri finiti, con larghezza e altezza non negative
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` è maggiore di `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	indica almeno uno tra `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/ja.tsv b/crates/ui-egui/src/i18n/ja.tsv
index 16d873ee32..403ab597c1 100644
--- a/crates/ui-egui/src/i18n/ja.tsv
+++ b/crates/ui-egui/src/i18n/ja.tsv
@@ -4981,6 +4981,7 @@ swatch	Bright Violet	ビビッドバイオレット
 @msg	`select` must be true or false	`select` には true または false を指定してください
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` と `maxAnchors` は整数にしてください
 @msg	`{key}` must be a number not below 0	`{key}` には 0 以上の数値を指定してください
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` には 0 以上の数値を 4 つ指定してください: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` は [x, y, width, height] の形式で指定してください: 有限の数値 4 つで、幅と高さは負の値にできません
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` が `{max_key}` より大きくなっています
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	次のうち少なくとも 1 つを指定してください: `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/ka.tsv b/crates/ui-egui/src/i18n/ka.tsv
index 667f6ca4c4..f13b20210d 100644
--- a/crates/ui-egui/src/i18n/ka.tsv
+++ b/crates/ui-egui/src/i18n/ka.tsv
@@ -4157,6 +4157,7 @@ font-technology	Variable	ცვლადი
 @msg	`select` must be true or false	`select` უნდა იყოს true ან false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` და `maxAnchors` უნდა იყოს მთელი რიცხვები
 @msg	`{key}` must be a number not below 0	`{key}` უნდა იყოს რიცხვი, არანაკლებ 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` უნდა იყოს ოთხი რიცხვი, თითოეული არანაკლებ 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` უნდა იყოს [x, y, width, height]: ოთხი სასრული რიცხვი, სიგანე და სიმაღლე არ უნდა იყოს უარყოფითი
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` მეტია, ვიდრე `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	მიუთითეთ ერთი მაინც: `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/ko.tsv b/crates/ui-egui/src/i18n/ko.tsv
index 926bfb6f3f..ed9530ab36 100644
--- a/crates/ui-egui/src/i18n/ko.tsv
+++ b/crates/ui-egui/src/i18n/ko.tsv
@@ -4908,6 +4908,7 @@ theme	Appearance	외관
 @msg	`select` must be true or false	`select`은(는) true 또는 false여야 합니다
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors`와 `maxAnchors`는 정수여야 합니다
 @msg	`{key}` must be a number not below 0	`{key}`은(는) 0 이상의 숫자여야 합니다
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}`은(는) 0 이상의 숫자 네 개여야 합니다: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}`은(는) [x, y, width, height]여야 합니다: 유한한 숫자 네 개이며 너비와 높이는 음수가 아니어야 합니다
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}`이(가) `{max_key}`보다 큽니다
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	다음 중 하나 이상을 지정하세요: `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/nl.tsv b/crates/ui-egui/src/i18n/nl.tsv
index 9152ecb3ec..e0b1e0900e 100644
--- a/crates/ui-egui/src/i18n/nl.tsv
+++ b/crates/ui-egui/src/i18n/nl.tsv
@@ -157,6 +157,7 @@
 @msg	`select` must be true or false	`select` moet true of false zijn
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` en `maxAnchors` moeten gehele getallen zijn
 @msg	`{key}` must be a number not below 0	`{key}` moet een getal van minstens 0 zijn
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` moet uit vier getallen van minstens 0 bestaan: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` moet [x, y, width, height] zijn: vier eindige getallen, width en height niet negatief
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` is groter dan `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	geef minstens een van `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/pl.tsv b/crates/ui-egui/src/i18n/pl.tsv
index ae2f4908c6..cfba6c8717 100644
--- a/crates/ui-egui/src/i18n/pl.tsv
+++ b/crates/ui-egui/src/i18n/pl.tsv
@@ -4591,6 +4591,7 @@ imageTrace	Outline	Kontur
 @msg	`select` must be true or false	`select` musi mieć wartość true lub false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` i `maxAnchors` muszą być liczbami całkowitymi
 @msg	`{key}` must be a number not below 0	`{key}` musi być liczbą nie mniejszą niż 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` musi być czterema liczbami nie mniejszymi niż 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` musi mieć postać [x, y, width, height]: cztery skończone liczby, szerokość i wysokość nieujemne
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` jest większe niż `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	podaj co najmniej jeden z parametrów `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/pt-br.tsv b/crates/ui-egui/src/i18n/pt-br.tsv
index 3a0a6879e9..1408194a1b 100644
--- a/crates/ui-egui/src/i18n/pt-br.tsv
+++ b/crates/ui-egui/src/i18n/pt-br.tsv
@@ -3921,6 +3921,7 @@ axis	Both	Ambos
 @msg	`select` must be true or false	`select` deve ser true ou false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` e `maxAnchors` devem ser números inteiros
 @msg	`{key}` must be a number not below 0	`{key}` deve ser um número não inferior a 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` deve ser quatro números não inferiores a 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` deve ser [x, y, width, height]: quatro números finitos, com largura e altura não negativas
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` é maior que `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	informe pelo menos um de `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/ru.tsv b/crates/ui-egui/src/i18n/ru.tsv
index 44c8b914b9..fb48a2974e 100644
--- a/crates/ui-egui/src/i18n/ru.tsv
+++ b/crates/ui-egui/src/i18n/ru.tsv
@@ -4495,6 +4495,7 @@ axis	Both	Оба
 @msg	`select` must be true or false	`select` должно быть true или false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` и `maxAnchors` должны быть целыми числами
 @msg	`{key}` must be a number not below 0	`{key}` должно быть числом не меньше 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` должно быть четырьмя числами не меньше 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` должно быть [x, y, width, height]: четыре конечных числа, ширина и высота не отрицательные
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` больше, чем `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	укажите хотя бы один из параметров `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/sv.tsv b/crates/ui-egui/src/i18n/sv.tsv
index 27117a1a61..0f1dfe719f 100644
--- a/crates/ui-egui/src/i18n/sv.tsv
+++ b/crates/ui-egui/src/i18n/sv.tsv
@@ -4367,6 +4367,7 @@ axis	Both	Båda
 @msg	`select` must be true or false	`select` måste vara true eller false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` och `maxAnchors` måste vara heltal
 @msg	`{key}` must be a number not below 0	`{key}` måste vara ett tal som inte är under 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` måste vara fyra tal som inte är under 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` måste vara [x, y, width, height]: fyra ändliga tal, där bredd och höjd inte är negativa
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` är större än `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	ange minst en av `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/tr.tsv b/crates/ui-egui/src/i18n/tr.tsv
index 7d98ecaa48..b2fe5fdd4b 100644
--- a/crates/ui-egui/src/i18n/tr.tsv
+++ b/crates/ui-egui/src/i18n/tr.tsv
@@ -4241,6 +4241,7 @@ axis	Both	Her İkisi
 @msg	`select` must be true or false	`select` true veya false olmalıdır
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` ve `maxAnchors` tam sayı olmalıdır
 @msg	`{key}` must be a number not below 0	`{key}` 0'dan küçük olmayan bir sayı olmalıdır
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` 0'dan küçük olmayan dört sayı olmalıdır: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` [x, y, width, height] olmalıdır: dört sonlu sayı, genişlik ve yükseklik negatif olmamalı
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}`, `{max_key}` değerinden büyük
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	şunlardan en az birini verin: `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/uk.tsv b/crates/ui-egui/src/i18n/uk.tsv
index 0ceca21bbf..27ba4a3668 100644
--- a/crates/ui-egui/src/i18n/uk.tsv
+++ b/crates/ui-egui/src/i18n/uk.tsv
@@ -4494,6 +4494,7 @@ axis	Both	Обидві
 @msg	`select` must be true or false	`select` має бути true або false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` і `maxAnchors` мають бути цілими числами
 @msg	`{key}` must be a number not below 0	`{key}` має бути числом, не меншим за 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` має бути чотирма числами, не меншими за 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` має бути [x, y, width, height]: чотири скінченні числа, ширина й висота невід’ємні
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` більше за `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	укажіть принаймні один із параметрів `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/vi.tsv b/crates/ui-egui/src/i18n/vi.tsv
index 39312c9214..ae630d2f30 100644
--- a/crates/ui-egui/src/i18n/vi.tsv
+++ b/crates/ui-egui/src/i18n/vi.tsv
@@ -4547,6 +4547,7 @@ theme	Appearance	Giao diện
 @msg	`select` must be true or false	`select` phải là true hoặc false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` và `maxAnchors` phải là số nguyên
 @msg	`{key}` must be a number not below 0	`{key}` phải là một số không nhỏ hơn 0
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` phải là bốn số không nhỏ hơn 0: [tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` phải là [x, y, width, height]: bốn số hữu hạn, chiều rộng và chiều cao không âm
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` lớn hơn `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	hãy cung cấp ít nhất một trong `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/zh-hans.tsv b/crates/ui-egui/src/i18n/zh-hans.tsv
index f6924adb06..a1f987563b 100644
--- a/crates/ui-egui/src/i18n/zh-hans.tsv
+++ b/crates/ui-egui/src/i18n/zh-hans.tsv
@@ -4667,6 +4667,7 @@ imageTrace	Outline	轮廓
 @msg	`select` must be true or false	`select` 必须是 true 或 false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` 和 `maxAnchors` 必须是整数
 @msg	`{key}` must be a number not below 0	`{key}` 必须是不小于 0 的数字
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` 必须是四个不小于 0 的数字：[tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` 必须是 [x, y, width, height]：四个有限数字，宽度和高度不能为负
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` 大于 `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	请至少提供以下其中之一：`name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/crates/ui-egui/src/i18n/zh-hant.tsv b/crates/ui-egui/src/i18n/zh-hant.tsv
index 06b73d2a4b..6253904b19 100644
--- a/crates/ui-egui/src/i18n/zh-hant.tsv
+++ b/crates/ui-egui/src/i18n/zh-hant.tsv
@@ -2406,6 +2406,7 @@ file-filter	Templates	範本
 @msg	`select` must be true or false	`select` 必須是 true 或 false
 @msg	`minAnchors` and `maxAnchors` must be whole numbers	`minAnchors` 和 `maxAnchors` 必須是整數
 @msg	`{key}` must be a number not below 0	`{key}` 必須是不小於 0 的數字
+@msg	`{key}` must be four numbers not below 0: [tl, tr, br, bl]	`{key}` 必須是四個不小於 0 的數字：[tl, tr, br, bl]
 @msg	`{key}` must be [x, y, width, height]: four finite numbers, width and height not negative	`{key}` 必須是 [x, y, width, height]：四個有限數字，寬度和高度不能為負
 @msg	`{min_key}` is greater than `{max_key}`	`{min_key}` 大於 `{max_key}`
 @msg	give at least one of `name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`	請至少提供下列其中之一：`name`, `kind`, `text`, `within`, `intersects`, `minWidth`, `maxWidth`, `minHeight`, `maxHeight`, `minThickness`, `maxThickness`, `minArea`, `maxArea`, `minAnchors`, `maxAnchors`
diff --git a/docs/mcp.md b/docs/mcp.md
index 707a414d0c..31ba6e6cb2 100644
--- a/docs/mcp.md
+++ b/docs/mcp.md
@@ -10872,6 +10872,32 @@ whole points and Escape cancels. A drag keeps a Contour's own corners and miter
 options `corners` and `miterLimit` (`tool.setOption`). A border with a gap is two Contours of one shape (the gap first, so
 it ends up in front), baked with `effect.expandAppearance`, then `object.pathfinder.minusFront`.
 
+## 3D Box and shapes add-on
+
+The `addon.shapes.*` commands draw rotatable 3D boxes (`addon.shapes.box3d`) and rectangles, ellipses, polygons, stars and
+spirals that keep their settings (`addon.shapes.rectangle`, `ellipse`, `polygon`, `star`, `spiral`), and
+`addon.shapes.configure` changes those settings on the selected shapes (or `ids`). An omitted or null value takes its
+default. A value outside its range is an error that names the parameter and the range, and the command then draws or
+changes nothing. The ranges are VectorCraft's own:
+
+| Parameter | Commands | Range (default) |
+|---|---|---|
+| `width`, `height` | `rectangle`, `ellipse`, `box3d` | pt, 0 or more |
+| `radius` | `polygon`, `spiral` | pt, 0 or more |
+| `radius` (corners) | `rectangle`, `configure` | pt, 0 or more (0); `configure` fits a larger radius to half each rectangle's shorter side |
+| `radii` | `rectangle`, `configure` | four numbers, 0 or more: `[tl, tr, br, bl]` |
+| `radius1` | `star` | pt, 0 or more |
+| `radius2` | `star` | 0.01 to 1 times `radius1` (half of it) |
+| `sides`, `points` | `polygon`, `star`, `configure` (`sides`) | a whole number from 3 to 1000 (6 sides, 5 points) |
+| `rounded`, `randomized` | `polygon`, `star`, `configure` | −10 to 10 (0) |
+| `spokeRatio` | `configure` | 0.01 to 1 |
+| `turns` | `spiral`, `configure` | 0.01 to 1024 (3) |
+| `divergence` | `spiral`, `configure` | 0 to 1000 (1) |
+| `innerRadius` | `spiral`, `configure` | 0 to 0.999 of the radius (0) |
+| `arcMode` | `rectangle`, `ellipse`, `polygon`, `star`, `configure` | `whole`, `pie` (or `slice`), `chord`, `arc` (or `open`) (`whole`) |
+
+A `configure` call that changes no shape records no undo step and returns `{updated: 0}`.
+
 ## Cutting Tools add-on
 
 Cutting Tools is a built-in add-on that prepares art for cutting. Its commands are `addon.cutting.bridges` and
diff --git a/docs/target-app-parity.md b/docs/target-app-parity.md
index e7c1b28726..46942dcba2 100644
--- a/docs/target-app-parity.md
+++ b/docs/target-app-parity.md
@@ -2031,6 +2031,15 @@ stored data), `cmd::addons::pathtools::tests` in `vectorcraft-engine` (each comm
 anchor edits and transforms, the SVG export filter, the tool's gestures), `addons::pathtools::tests` in
 `vectorcraft-ui-egui` (submenu and panel) and `command_sweep`.
 
+The 3D Box and shapes add-on's commands (`addon.shapes.*`, 2026-11-13) refuse a value outside its range with an error
+that names the parameter and the range, and draw or change nothing: polygon sides and star points are whole numbers
+from 3 to 1,000 ([the help page](https://helpx.adobe.com/illustrator/desktop/draw-shapes-and-paths/modify-live-shapes/live-shape-properties.html)),
+sizes and corner radii are not negative, a star's inner radius is 0.01 to 1 times its outer radius, and rounding,
+randomizing, spoke ratio, spiral turns, divergence and inner radius keep VectorCraft's own ranges; `arcMode` takes
+only the names it lists. `addon.shapes.configure` checks every value before it changes any selected shape and records
+no undo step when nothing changes. Tests: `cmd::addons::shapes::tests` in `vectorcraft-engine`. Commands:
+`docs/mcp.md` › 3D Box and shapes add-on.
+
 The add-on's Corner Tool (2026-10-31) edits the Live Corners every path already keeps (no second corner store): hover
 shows an anchor that can take a corner, a click cuts one with the tool's radius and kind (round, inverted, chamfer), a
 drag sizes it (Shift: whole values), a cut corner's marker selects it and loads its values, resizes it, and removes it